edit... just saw the mp-17 not for sale in ca... single shot exemption maybe??

__________________
"One of the ordinary modes, by which tyrants accomplish their purposes without resistance, is, by disarming the people, and making it an offense to keep arms."
-- Constitutional scholar and Supreme Court Justice Joseph Story, 1840

"The most foolish mistake we could possibly make would be to allow the subjected people to carry arms. History shows that all conquerors who have allowed their subjected peoples to carry arms have prepared their own fall."
— Adolf Hitler, Edict of 18 March 1939

17HMR is problematic in semi-autos. It has a peaky pressure curve that makes it hard to design a safe, reliable semi-auto. Most, if not all, 17HMR semi-auto rifles are now discontinued, and some have been pulled back by the Mfg. Other than some niche manufacturer like Excel Arms, I don't think anyone has worked on a 17HMR pistol.

here's the links for their rifles, seems they still have the 17HMR, I know they used to make a semi auto pistol also but you are talking big bucks. You can always get an Excel Arms MP22 and convert to 17HMR